It's the end of an era — Nightmare on Grayson, the venerable haunted house that has been proudly scaring San Antonio since 1989, will scream its last after this Halloween season. The property is being sold to a group that's planning a mixed-use development.

Hmmm ... maybe it could be a scary mixed-use development? Probably not.

Anyway, here's a roundup of key events of the long Halloween weekend leading up to Wednesday night, when kids — some of whom may actually be from your neighborhood — will ring your doorbell in search of treats. Find movie events on Page 4, club mayhem in the Music section and area events in All Directions:

Familiar haunts

Nightmare On Grayson 201 E. Grayson St. Expect the folks running Grayson to go all out as the haunted house heads to the graveyard. Plus entertainment on the grounds for those who survive. Through Monday; nightmareongrayson.com.

13th Floor 1203 E. Commerce St. Third year of the massive, three-story attraction housed in a century-old cold storage warehouse features a new section, Ground Up, and a new ride, The Grinder, a spiral slide from the third floor to the basement, where a slaughterhouse awaits. Fun. Through Wednesday. 13thfloorsanantonio.com.

Terror Mansion, 414 W. Laurel St. Paranormal and other types of activity are sure to lurk in the 23 rooms of terror where Jason, Freddy, Leatherface, Michael and Jigsaw like to chill. Open through Halloween; terrormansionusa.com

Coffins on Parade River Walk, 6-8 p.m. Saturday. The barges are converted into floating coffins filled with revelers who are far from dead. Same-day river-related events include Halloween Hustle 5 and 10K run along the Mission Reach at 7 a.m. and the family- friendly Treat Street event from noon-6 p.m. in La Villita.

Ripley's Haunted Adventure Alamo Plaza. Every day is Halloween at Ripley's, where the frights start after a coffin-cage ride to the top floor. Then you have to find your way out. Good luck.

Theme parks

Six Flags Fiesta Texas' “Fright Fest” Mayor Slayer is back in the house in the Midnight Mansion — 13 rooms filled with the ungrateful dead — and leading the “Monster Mash Bash” of singing and dancing ghouls. There's also the undead revue “Last Chance Legends.” And beware those zombies in Rockville.

SeaWorld's “Howl-O-Scream” The menacing Jack-O-Lantern rules Pumpkingdom, stars in “Jack Is Back,” a new song-and-dance show; and is emcee of “Shamu's Rocking Creepshow. Not to be outdone, sea lions Clyde and Seamore star in the new “Clyde and Seamore's Monster Mix-Up.” Haunted mazes and scare zones await more daring guests.

SAC Recital 7:30 p.m. Thursday, McAllister Auditorium. Not to be outdone, the San Antonio College music and drama programs present “Twilight Tones,” a seasonal fund-raiser.

Stage

“The Rocky Horror Show” 8 p.m. Thursday, 10 p.m. Friday-Saturday, Woodlawn Theatre. Corset-clad Rocky and his goth cotillion always turn up this time of year, but this time he has some company in the same space ...

“Boogie Monster Mash” 7:30 p.m. Friday-Saturday, 3 p.m. Sunday, Woodlawn Theater. What could be better than a monster melodrama set to disco? For that matter, what could be worse?

“The Mystery of Irma Vep” 7:30 p.m. Thursday-Saturday and Wednesday, Littly Italy Restaurant. The Company Theatre's Halloween show is this family- friendly horror comedy that The Company describes as “‘Young Frankenstein' meets ‘Greater Tuna.'”

Kids

Zoo Boo 6:30 p.m. Tuesday-Wednesday, San Antonio Zoo. The emphasis is on nonscary fun, as kids 12 and younger can enjoy trick-or-treating, face painting, games and a costume contest. Prepare for big crowds, though. Advance tickets allow entrance through the education center. And the animals get in on the fun Friday at the Pumpkin Bash.

Almost every club has a Halloween event this weekend. But here are some things you don't see every day ...

Horror on Houston Street 7 p.m. Saturday, Backstage Live. How can you not notice an event featuring Bozo Porno Circus? The Houston industrial/metal band headlines the four-band bill at this KISS-FM event.